TWI428306B - Optical glass - Google Patents
Optical glass Download PDFInfo
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- TWI428306B TWI428306B TW99124379A TW99124379A TWI428306B TW I428306 B TWI428306 B TW I428306B TW 99124379 A TW99124379 A TW 99124379A TW 99124379 A TW99124379 A TW 99124379A TW I428306 B TWI428306 B TW I428306B
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- 239000005304 optical glass Substances 0.000 title claims description 29
- 239000000203 mixture Substances 0.000 claims description 29
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 26
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 19
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical group [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 19
- LJCFOYOSGPHIOO-UHFFFAOYSA-N antimony pentoxide Chemical compound O=[Sb](=O)O[Sb](=O)=O LJCFOYOSGPHIOO-UHFFFAOYSA-N 0.000 claims description 12
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 9
- 229910001947 lithium oxide Inorganic materials 0.000 claims description 9
- 229910000417 bismuth pentoxide Inorganic materials 0.000 claims description 6
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims description 4
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical group [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 2
- UFQXGXDIJMBKTC-UHFFFAOYSA-N oxostrontium Chemical compound [Sr]=O UFQXGXDIJMBKTC-UHFFFAOYSA-N 0.000 claims description 2
- 229910001392 phosphorus oxide Inorganic materials 0.000 claims 3
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical group O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 claims 3
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims 1
- 239000011521 glass Substances 0.000 description 13
- 239000006185 dispersion Substances 0.000 description 8
- 229910000464 lead oxide Inorganic materials 0.000 description 6
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004031 devitrification Methods 0.000 description 2
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000005385 borate glass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- DQUIAMCJEJUUJC-UHFFFAOYSA-N dibismuth;dioxido(oxo)silane Chemical compound [Bi+3].[Bi+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O DQUIAMCJEJUUJC-UHFFFAOYSA-N 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- KHKSXAYMYFVLBL-UHFFFAOYSA-N tris(phosphanyl) phosphate Chemical compound POP(=O)(OP)OP KHKSXAYMYFVLBL-UHFFFAOYSA-N 0.000 description 1
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- Glass Compositions (AREA)
Description
本發明係與光學玻璃有關，更詳而言之是指一種高折射、低色散(色差小)光學玻璃，其折射率(nd)在1.64至1.73之範圍內及阿貝數(vd)在32.2至46.7之範圍內之光學玻璃者。The present invention relates to optical glass, and more particularly to a high refractive, low dispersion (small color difference) optical glass having a refractive index (nd) in the range of 1.64 to 1.73 and an Abbe number (vd) of 32.2. Optical glass to the extent of 46.7.
按，光學玻璃的兩個重要參數是折射率和阿貝數(又稱色散指數)，阿貝數是用來衡量介質的光線色散程度，阿貝數越小光線色散程度越大，反之，阿貝數越大則光線色散程度越小，亦即色差越小。習知高折射率之光學玻璃係以大量含有氧化鉛之組成系為代表，由於玻璃之穩定性佳、且玻璃轉移點(Tg )低，因此被作為精密模壓成形用使用，如日本特開平1-308843號專利揭示有大量含有氧化鉛之精密模壓用之光學玻璃。然而，由於實施精密模壓成形時之環境，為了防止金屬模具之氧化，被保持於還原性氣氛，因此，在玻璃成分中含有氧化鉛時，會有由玻璃表面析出被還原之鉛，附著於金屬模具表面，無法維持金屬模具之精密面之問題。又，氧化鉛對環境有害，期望無鉛化。According to the two important parameters of optical glass are refractive index and Abbe number (also known as dispersion index), Abbe number is used to measure the degree of light dispersion of the medium, the smaller the Abbe number, the greater the dispersion of light, and vice versa. The larger the number of bets, the smaller the degree of chromatic dispersion, that is, the smaller the chromatic aberration. The optical glass having a high refractive index is represented by a composition containing a large amount of lead oxide, and is excellent in stability of glass and low in glass transition point (T g ), and thus is used as a precision press molding, such as Japan Kaiping Patent No. 1-308843 discloses a large number of optical glasses for precision molding containing lead oxide. However, since the environment in the case of performing precision press molding is maintained in a reducing atmosphere in order to prevent oxidation of the metal mold, when lead oxide is contained in the glass component, lead which is reduced by precipitation on the surface of the glass and adheres to the metal The surface of the mold cannot maintain the problem of the precise surface of the metal mold. Moreover, lead oxide is harmful to the environment and is expected to be lead-free.
為解決前述問題，高折射率且不含氧化鉛之壓製成形用光學玻璃被大量開發，幾乎係以磷酸鹽為基礎之體系。例如，日本特開2003-321245號、特開平8-157231號、特開2003-300751號及中華民國發明第I305525號等專利所示，幾乎皆含有P2 O5 、Nb2 O5 及Li2 O、Na2 O或K2 O成分。不過，磷酸鹽系光學玻璃雖可解決含有氧化鉛成份之光學玻璃製作時無法維持金屬模具精密面之問題，但阿貝數較低，亦即，色差較大，換言之，光學品質仍有待提升。In order to solve the above problems, an optical glass for press molding having a high refractive index and containing no lead oxide has been extensively developed, and is almost a phosphate-based system. For example, Japanese Patent Laid-Open No. 2003-321245, Laid-Open No. 8-157231, Patent Laid-Open No. 2003-300751 invention and ROC Patent No. I305525, etc. as shown, almost all containing P 2 O 5, Nb 2 O 5 and Li 2 O, Na 2 O or K 2 O component. However, the phosphate-based optical glass can solve the problem that the precise surface of the metal mold cannot be maintained when the optical glass containing the lead oxide component is produced, but the Abbe number is low, that is, the color difference is large, in other words, the optical quality still needs to be improved.
本發明之主要目的即在提供一種可解決前揭缺失之光學玻璃，其折射率在1.56至1.73之範圍內，且，阿貝數在32.2至46.7之範圍內，其折射率不低、阿貝數較習知磷酸鹽系光學玻璃更高，俾具備更佳之光學品質者。The main object of the present invention is to provide an optical glass which can solve the defects of the prior art, and has a refractive index in the range of 1.56 to 1.73, and an Abbe number in the range of 32.2 to 46.7, and the refractive index is not low, Abbe. The number is higher than that of the conventional phosphate-based optical glass, and the 俾 has better optical quality.
緣是，為達成前述之目的，本發明係提供一種光學玻璃，以氧化物基準之莫耳%，包含有30～40 mol%之五氧化二磷；7.5～20%之五氧化二鈮；及40～52.5 mol%之氧化鍶，其折射率在1.64至1.73之範圍內及阿貝數在32.2至46.7之範圍內。In order to achieve the foregoing object, the present invention provides an optical glass comprising, based on the oxides, % of molybdenum, comprising 30 to 40 mol% of phosphorus pentoxide; 7.5 to 20% of antimony pentoxide; 40 to 52.5 mol% of cerium oxide having a refractive index in the range of 1.64 to 1.73 and an Abbe number in the range of 32.2 to 46.7.
進一步地，氧化鍶之一部分或全部以鹼金屬氧化物取代。Further, part or all of the cerium oxide is substituted with an alkali metal oxide.
進一步地，鹼金屬氧化物係氧化鋰。Further, the alkali metal oxide is lithium oxide.
進一步地，氧化鍶之組成範圍為＜40～10 mol%，五氧化二鈮之組成範圍為10%，五氧化二磷之組成範圍為40 mol%。Further, the composition range of cerium oxide is <40 to 10 mol%, the composition range of bismuth pentoxide is 10%, and the composition range of phosphorus pentoxide is 40 mol%.
進一步地，氧化鋰之組成範圍為10～40 mol%，氧化鍶之組成範圍為＜40～10 mol%，五氧化二鈮之組成範圍為15%，五氧化二磷之組成範圍為35 mol%。Further, the composition range of lithium oxide is 10 to 40 mol%, the composition range of cerium oxide is <40 to 10 mol%, the composition range of bismuth pentoxide is 15%, and the composition range of phosphorus pentoxide is 35 mol%. .
進一步地，氧化鋰之組成範圍為10～40 mol%，氧化鍶之組成範圍為＜30～10 mol%，五氧化二鈮之組成範圍為30%，五氧化二磷之組成範圍為30 mol%。Further, the composition range of lithium oxide is 10 to 40 mol%, the composition range of cerium oxide is <30 to 10 mol%, the composition range of bismuth pentoxide is 30%, and the composition range of phosphorus pentoxide is 30 mol%. .
進一步地，五氧化二磷之莫耳百分率為40 mol%、五氧化二鈮之莫耳百分率為7.5 mol%、氧化鍶之莫耳百分率為52.5mol%，阿貝數係46.72。Further, the molar percentage of phosphorus pentoxide is 40 mol%, the molar percentage of bismuth pentoxide is 7.5 mol%, the percentage of cerium oxide is 52.5 mol%, and the Abbe number is 46.72.
以下，茲舉本發明數較佳實施例，並配合圖式做進一步之詳細說明如後：Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the drawings:
本發明一較佳實施例之光學玻璃(鍶鈮磷酸鹽玻璃)，主要由五氧化二磷(P2 O5 )、五氧化二鈮(Nb2 O5 )及氧化鍶(SrO)等成分所組成，而各該組成成分之莫耳百分率如下：The optical glass (phosphonium phosphate glass) according to a preferred embodiment of the present invention is mainly composed of phosphorus pentoxide (P 2 O 5 ), niobium pentoxide (Nb 2 O 5 ) and strontium oxide (SrO). Composition, and the percentage of moles of each component is as follows:
五氧化二磷 30~60%Phosphorus pentoxide 30~60%
五氧化二鈮 0～25%Antimony pentoxide 0~25%
氧化鍶 30～50 mol%。Cerium oxide is 30 to 50 mol%.
五氧化二磷為玻璃成形劑，做為玻璃主體成份，可賦予玻璃高色散特徵及高透光率之成分，與矽酸鹽玻璃及硼酸鹽玻璃比較，五氧化二磷可賦予玻璃極佳熔解性質及抗失透性，尤其是壓製時之抗失透性及極佳透光率。Phosphorus pentoxide is a glass forming agent, which is a glass main component, which can impart high dispersion characteristics and high light transmittance of glass. Compared with bismuth silicate glass and borate glass, phosphorus pentoxide can impart excellent melting to glass. Properties and resistance to devitrification, especially resistance to devitrification and excellent light transmission during pressing.
五氧化二鈮為玻璃中間劑，乃屬於為獲得高折射率、高分散玻璃上所必需的成分，不過，含量過高時會導致轉移溫度(Tg)上升。Bismuth pentoxide is a glass intermediate agent, which is a necessary component for obtaining a high refractive index and high dispersion glass. However, when the content is too high, the transition temperature (Tg) is increased.
氧化鍶為玻璃修飾劑，會輕微提高折射率，不過，含量過低時玻璃無法熔融。Cerium oxide is a glass modifier that slightly increases the refractive index, but the glass does not melt when the content is too low.
製作本發明光學玻璃時，係依前揭組成成分將原料調配與混合，再將混合均勻之粉末裝填於一坩堝中，再置入一爐中以約1000℃以上之溫度(視玻璃組成而定)恆溫持溫適當時間，使各成份可完全熔融並達均質化。然後將熔融之玻璃液傾倒於一模具上成型，再冷卻至室溫而得。When the optical glass of the present invention is produced, the raw materials are prepared and mixed according to the composition of the prior composition, and the uniformly mixed powder is loaded into a crucible, and then placed in a furnace at a temperature of about 1000 ° C or higher (depending on the composition of the glass) The temperature is kept at a constant temperature for a suitable time so that the components can be completely melted and homogenized. The molten glass liquid is then poured onto a mold and molded, and then cooled to room temperature.
藉此，本發明該光學玻璃之玻璃特性，可由各實施例明示：Thereby, the glass characteristics of the optical glass of the present invention can be clearly illustrated by the respective embodiments:
如表一之實例1(Ex.1)~實例6(Ex.6)所示，本發明光學玻璃之五氧化二磷含量依序為40、40、40、40、40、35及30%；五氧化二鈮之含量依序為7.5、10、15、20、15、20及30%；氧化鍶之含量依序為52.5、50、45、40、50及50%。由表一可知，本發明光學玻璃之折射率可達1.73，而阿貝數可達46.7，較一般光學玻璃之阿貝數更高，光線之色散程度更小。As shown in Example 1 (Ex. 1) to Example 6 (Ex. 6) of Table 1, the phosphorus pentoxide content of the optical glass of the present invention is sequentially 40, 40, 40, 40, 40, 35 and 30%; The content of antimony pentoxide is 7.5, 10, 15, 20, 15, 20 and 30%, and the content of cerium oxide is 52.5, 50, 45, 40, 50 and 50%. As can be seen from Table 1, the refractive index of the optical glass of the present invention can reach 1.73, and the Abbe number can reach 46.7, which is higher than the Abbe number of the general optical glass, and the degree of dispersion of the light is smaller.
不過，該光學玻璃之轉移溫度(Tg)較高，若以氧化鋰(Li2 O)部份取代成分中之氧化鍶，其他成分比例固定，如表二之實例7(Ex.7)~實例10(Ex.10)所示，氧化鋰之含量依序為10、20、30及40%，而氧化鍶之含量依序為40、30、20及10%，可有效降低轉移溫度並避免折射率大幅下降。However, the transfer temperature (Tg) of the optical glass is relatively high. If the ruthenium oxide in the component is replaced by lithium oxide (Li 2 O), the ratio of other components is fixed, as shown in Example 7 (Ex. 7) of Table 2 - Examples 10 (Ex. 10), the content of lithium oxide is 10, 20, 30 and 40%, and the content of cerium oxide is 40, 30, 20 and 10%, which can effectively reduce the transfer temperature and avoid refraction. The rate has dropped significantly.
此外，如表三之實例11(Ex.11)~實例14(Ex.14)所示，固定氧化鋰與氧化鍶之含量，同時提升五氧化二鈮之含量至15%，並降低五氧化二磷之含量至35%，可提高折射率，並維持住極低的轉移溫度。In addition, as shown in Example 11 (Ex. 11) to Example 14 (Ex. 14) of Table 3, the content of lithium oxide and cerium oxide is fixed, and the content of cerium oxide is increased to 15%, and the pentoxide is reduced. A phosphorus content of up to 35% increases the refractive index and maintains a very low transfer temperature.
再者，如表四之實例15(Ex.15)~實例18(Ex.18)所示，固定氧化鋰之含量，同時降低氧化鍶與五氧化二磷(30%)之含量，並提升五氧化二鈮之含量至30%，可更提高折射率至1.85並維持住低的轉移溫度。Furthermore, as shown in Example 15 (Ex. 15) to Example 18 (Ex. 18) of Table 4, the content of lithium oxide is fixed, and the content of cerium oxide and phosphorus pentoxide (30%) is lowered, and the amount is increased. The content of cerium oxide to 30% can increase the refractive index to 1.85 and maintain a low transfer temperature.
由上可知，本發明所提供之光學玻璃，係磷酸鹽系玻璃，其適當調整各成分之比例可使折射率提升至1.85，阿貝數最高可達46.7，高於習知磷酸鹽系光學玻璃之阿貝數，而可具備更佳之光學品質。It can be seen from the above that the optical glass provided by the present invention is a phosphate-based glass, and the ratio of each component can be appropriately adjusted to increase the refractive index to 1.85, and the Abbe number can be up to 46.7, which is higher than the conventional phosphate-based optical glass. The Abbe number has better optical quality.
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Claims (7)
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| TW99124379A TWI428306B (en) | 2010-07-23 | 2010-07-23 | Optical glass |
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| TW99124379A TWI428306B (en) | 2010-07-23 | 2010-07-23 | Optical glass |
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| TW201204671A TW201204671A (en) | 2012-02-01 |
| TWI428306B true TWI428306B (en) | 2014-03-01 |
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